Question

这是我的问题：我已经提供了一个应用程序，我必须编写测试用例才能使用JUnit对其进行测试。例如：实例化具有属性String name的对象，此字段不能超过10个字符。我如何将其纳入测试方法？这是我的代码：要测试的课程是：

package hdss.io;

import hdss.exceptions.HydricDSSException;

public class AquiferPublicData implements WaterResourceTypePublicData {
    private String myName;
    private float currentHeight;

    public AquiferPublicData (String name, float current)   throws HydricDSSException{

        try {
            if(name.length()>10) //name must be shorter than 11 chars
                throw new HydricDSSException("Name longer than 10");
            else{
                myName = name;      
                currentHeight = current;
            }
        } catch (HydricDSSException e) {            
        }
    }

    public String getMyName() {
        return myName;
    }
}

我的测试方法是：

package hdss.tests;

import static org.junit.Assert.*;

import org.junit.Test;

import hdss.exceptions.HydricDSSException;
import hdss.io.AquiferPublicData;

public class AquiferPublicDataTest {

    @Test
    public void testAquiferPublicData() {
        String notValidName = "this-name-is-too-long";
        try {
            AquiferPublicData apd = new AquiferPublicData(notValidName, 10);
            fail("Was supposed to throw Exception if name is longer than 10 chars");
        } catch (HydricDSSException e) {
            assertEquals("Name longer than 10", e.getMessage());
        }
    }

}

而且例外是：

package hdss.exceptions;

public class HydricDSSException extends Exception{

    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    String message;

    //Esfuerzo Actual: 1.5 minutos

    public HydricDSSException (String message){

        this.message = message;
    }

    //Esfuerzo Actual: 1.5 minutos

    public String getMessage(){

        return this.message;
    }

}

Answer 1

您的问题是原始构造函数。您在签名中有throws子句。你不应该在构造函数中有一个try / catch块。删除它。

public AquiferPublicData (String name, float current)   throws HydricDSSException{
    if(name.length()>10) throw new HydricDSSException("Name longer than 10");
    myName = name;      
    currentHeight = current;
}

你应该编写一个JUnit测试，证明如果名称长于10，则抛出异常。

public class AquiferPublicDataTest {

    @Test
    public void testConstructor_Success() {
        // setup 
        String name = "Jones";
        // exercise
        AquiferPublicData data = new AquiferPublicData(name, 0.0);
        // assert
        Assert.assertEquals(name, data.getMyName());
    }

    @Test(expects = HydricDSSException.class)
    public void testConstructor_NameTooLong() throws HydricDSSException {
        // setup 
        String name = "this one is too long";
        // exercise
        new AquiferPublicData(name, 0.0);
    }
}

如果名称为空，您期望什么？这是允许的吗？你现在要获得一个空指针异常。

JUnit在测试中捕获异常

1 个答案: